Methods and systems for treatment of cerebral edema
AssigneeInventx LLC
InventorsRick M. Odland, Michael R. Wilson, John Borgos
Life of this patent
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Abstract
Methods and systems for reduction of cerebral edema including catheter systems. A catheter system includes an elongated main body including a proximal end, a distal end, a central lumen and a plurality of outer lumens extending therethrough and the outer lumens positioned around the central lumen, a hollow fiber portion distal to the main body, and a cap distal to and connected to the hollow fibers. The hollow fiber portion includes a plurality of hollow fibers comprising elongated hollow tubes with semipermeable walls surrounding a drainage catheter. The hollow fibers terminate in the cap which forms a plenum for gas sweeping through the outer lumens and the hollow fibers.
Claims20
A catheter system for reduction of cerebral edema comprising a catheter, the catheter comprising:
- an elongated main body comprising a proximal end, a distal end, a central lumen and a plurality of outer lumens, the central lumen and the outer lumens extending therethrough and the outer lumens positioned around the central lumen;
- a hollow fiber portion distal to the main body, the hollow fiber portion comprising
- a plurality of hollow fibers comprising elongated hollow tubes with semipermeable walls, the semipermeable walls being gas permeable and liquid impermeable, the hollow fibers each comprising a proximal end connected to one of the plurality of outer lumens, and
- a drainage catheter, and the drainage catheter comprising a central lumen, a plurality of pores, the drainage catheter having a proximal end connected to the central lumen of the elongated main body and a distal sealed end, the plurality of hollow fibers are positioned around the drainage catheter;
- a cap distal to and connected to the hollow fibers, the cap comprising an outer wall that forms a central space into which the hollow fibers extend and terminate at open distal ends, the central space forming a plenum for gas sweeping through the outer lumens and the hollow fibers.
A method of treatment of cerebral edema comprising:
- inserting a distal end of a catheter into a ventricle of a brain of a patient suffering from cerebral edema, the catheter comprising:
- an elongated main body comprising a proximal end, a distal end, a central lumen and a plurality of outer lumens, the central lumen and the outer lumens extending therethrough and the outer lumens positioned around the central lumen;
- a hollow fiber portion distal to the main body, the hollow fiber portion comprising
- a plurality of hollow fibers comprising elongated hollow tubes with semipermeable walls, the semipermeable walls being gas permeable and liquid impermeable, the hollow fibers each comprising a proximal end connected to one of the plurality of outer lumens, and
- a drainage catheter, and the drainage catheter comprising a central lumen, a plurality of pores, the drainage catheter having a proximal end connected to the central lumen of the elongated main body and a distal sealed end, the plurality of hollow fibers are positioned around the drainage catheter;
- a cap distal to and connected to the hollow fibers, the cap comprising an outer wall that forms a central space into which the hollow fibers extend and terminate at open distal ends, the central space forming a plenum for gas sweeping through the outer lumens and the hollow fibers;
- and
- a manifold connected to the proximal end of the main body, wherein the outer lumens split into a first group and a second group lateral to the central lumen;
- connecting the catheter to a source of dry gas and a vacuum, the dry gas supplied to the catheter through the first group of outer lumens and the vacuum applied to the catheter through the second group of outer lumens;
- supplying the dry gas and vacuum to the catheter.
The method of inserting a treatment catheter into a treatment location in a patient, the method comprising:
- forming a craniotomy hole at a location in the skull of the patient;
- inserting a first end of a treatment catheter through the craniotomy hole and to a position for treatment, the treatment catheter further comprising a second end which remains external to the patient after this step of inserting the first end;
- forming a tunnel beneath the scalp of a patient, the tunnel extending from the location of a craniotomy hole to an incision in the scalp at a distance of 2 centimeters or more from the craniotomy hole location;
- after inserting the first end of the treatment catheter through the craniotomy hole into the position for treatment, attaching the second end of a treatment catheter to a connector end of a trocar;
- passing the trocar with the attached treatment catheter through the tunnel such that the trocar pulls the second end of the treatment catheter through the tunnel and the second end of the treatment catheter exists the tunnel through the incision;
- and then
- detaching the trocar from the treatment catheter.
Dependencies are inferred from the claim text.